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弓形的滚动
Author:
萧若茂
GeoGebra
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柱體建築師
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
【案例】2013年安徽高考15题
球体的体积推导（优化版）
Discover Resources
Trapezoid1
gjh-h02-01 歐幾里德的畢氏證明
斜線
Angle between 2 planes
正弦定理的副本
Discover Topics
Complex Numbers
Addition
Equilateral Triangles
Upper and Lower Sum or Riemann Sum
Similar Triangles